Since the abrasives on the lapping tool are uniformly distributed, the number of abrasives on a circle with radius R is directly proportional to its the circle perimeter and its radius R.

 
  • 因为磨具上磨料是均匀分布的,所以磨具上任一半径R处的磨料微粒数量与其周长正成比,也就是与其半径R成正比。
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